code: def run(self):
      self.lit_dash.run()
  
      # Launch some processing based on the Dash Dashboard.
      self.processor.run(self.lit_dash.df, self.lit_dash.selected_year)
  
file_path: pytorch-lightning/docs/source-app/workflows/add_web_ui/dash/intermediate_plot.py
imports: from typing import Optional
  import pandas
  import plotly.express
  from dash import Dash, dcc, html, Input, Output
  from lightning.app import LightningWork, LightningFlow, LightningApp
  from lightning.app.storage import Payload
label_desc: Use image node_id 2 for calling the LitApp obj's underlying member method code with example usage: obj.run() without return types